| 摘要 |
PROBLEM TO BE SOLVED: To provide a glass-fiber forming composition of a low boron content. SOLUTION: The glass-fiber forming composition contains 52-62 wt.% SiO<SB>2</SB>, 0-2 wt.% Na<SB>2</SB>O, 16-25 wt.% CaO, 8-16 wt.% Al<SB>2</SB>O<SB>3</SB>, 0.05-0.80 wt.% Fe<SB>2</SB>O<SB>3</SB>, 0-2 wt.% K<SB>2</SB>O, 1-5 wt.% MgO, 0-5 wt.% B<SB>2</SB>O<SB>3</SB>, 0-2 wt.% TiO<SB>2</SB>, and 0-1 wt.% F. Further, the composition, based on the NIST Standard Reference 714, has≤1,240°C log3 forming temperature,≥50°CΔT, and≤2.35 SiO<SB>2</SB>/RO ratio. COPYRIGHT: (C)2007,JPO&INPIT
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